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Deviant Logic, Fuzzy Logic

Beyond the Formalism

Initially proposed as rivals of classical logic, alternative logics have become increasingly important in areas such as computer science and artificial intelligence. Fuzzy logic, in particular, has motivated major technological developments in recent years.

Susan Haack’s Deviant Logic provided the first extended examination of the philosophical consequences of alternative logics. In this new volume, Haack includes the complete text of Deviant Logic, as well as five additional papers that expand and update it. Two of these essays critique fuzzy logic, while three augment Deviant Logic’s treatment of deduction and logical truth. Haack also provides an extensive new foreword, brief introductions to the new essays, and an updated bibliography of recent work in these areas.

Deviant Logic, Fuzzy Logic will be indispensable to students of philosophy, philosophy of science, linguistics, mathematics, and computer science, and will also prove invaluable to experienced scholars working in these fields.

318 pages | 6 x 9 | © 1996

Cognitive Science: General Works

Philosophy: Logic and Philosophy of Language

Table of Contents

Introduction, 1996
Note on Notation
Deviant Logic
Preface and Acknowledgements
Ch. 1: ’Alternative’ in ’Alternative Logic’
Ch. 2: Reasons for Deviance
Ch. 3: Deviance and the Theory of Truth
Ch. 4: Future Contingents
Ch. 5: Intuitionism
Ch. 6: Vagueness
Ch. 7: Singular Terms and Existence
Ch. 8: Quantum Mechanics
Deduction and Logical Truth
The Justification of Deduction
Dummett’s Justification of Deduction
Analyticity and Logical Truth in The Roots of Reference
Fuzzy Logic
Do We Need ’Fuzzy Logic’?
Is Truth Flat or Bumpy?
Supplementary Bibliography of Selected Recent Material
Works Cited

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